Question

what would most likely happen if green plants were exposed to longer days of sunlight

Answer 1

The plant will burn so keep it one foot away from your window or u will be fighting the plant and loose...

Answer 2

With the proper amount of water it can grow faster, through preforming photosynthesis more. But you must be sure not to leave it in the sun past its recommended time because it can dry the leaves and kill the plan.